/* 推广卡片基础样式 */
.promo-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    border: none;
    cursor: pointer;
    width: 100%;
    box-sizing: border-box;
}

/* 卡片悬浮效果 */
.promo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* 图标容器 */
.promo-icon-wrapper {
    position: relative;
    margin-bottom: 10px;
    z-index: 1;
}

/* 主图标样式 */
.main-icon {
    font-size: 36px;
    padding: 15px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

/* 标签图标样式 */
.tag-icon {
    position: absolute;
    top: -5px;
    right: -5px;
    font-size: 20px;
    padding: 6px;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    background: #fff;
}

/* 内容区域样式 */
.promo-content {
    text-align: center;
    z-index: 1;
}

.promo-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
    color: #333;
}

.promo-content p {
    font-size: 12px;
    color: #666;
    margin: 0;
}

/* 小说模块特定样式 */
.promo-card.novel {
    height: 280px;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
}

.promo-card.novel .main-icon {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.promo-card.novel .tag-icon {
    color: #ff6b6b;
}

/* 文学模块特定样式 */
.promo-card.literature {
    height: 132.5px;
    background: linear-gradient(135deg, #fff 0%, #f0f4f8 100%);
}

.promo-card.literature .main-icon {
    color: #4a90e2;
    background: rgba(74, 144, 226, 0.1);
}

.promo-card.literature .tag-icon {
    color: #4a90e2;
}

/* 教育模块特定样式 */
.promo-card.education {
    height: 132.5px;
    background: linear-gradient(135deg, #fff 0%, #f0f8f4 100%);
}

.promo-card.education .main-icon {
    color: #2ecc71;
    background: rgba(46, 204, 113, 0.1);
}

.promo-card.education .tag-icon {
    color: #2ecc71;
}

/* 推广列表布局 */
.promo-ul {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.promo-ul li {
    flex: 1;
    margin: 0;
}

/* 响应式布局 */
@media screen and (max-width: 992px) {
    .promo-ul {
        flex-direction: row;
    }

    .promo-card.novel,
    .promo-card.literature,
    .promo-card.education {
        height: 240px;
    }

    .main-icon {
        font-size: 32px;
        padding: 12px;
    }

    .tag-icon {
        font-size: 18px;
        padding: 5px;
    }
}

@media screen and (max-width: 576px) {
    .promo-ul {
        flex-direction: column;
    }

    .promo-card.novel,
    .promo-card.literature,
    .promo-card.education {
        height: 200px;
    }

    .main-icon {
        font-size: 28px;
        padding: 10px;
    }

    .tag-icon {
        font-size: 16px;
        padding: 4px;
    }

    .promo-content h3 {
        font-size: 14px;
    }

    .promo-content p {
        font-size: 10px;
    }
}